JP6494925B2 - Water-in-oil emulsion composition - Google Patents

Description

  The present invention is a water-in-oil emulsified composition in which moisture contained by the pressure and shearing force at the time of application is released, and has a high refreshing feeling and moisturizing feeling. In addition, the present invention relates to a water-in-oil emulsion composition that does not give a feeling of stickiness or sliminess in a writing operation with a pen.

In recent years, air conditioners have become widespread and office environments have become comfortable, but hand drying with air conditioners has become a problem. Therefore, not only in winter but throughout the year, it has come to care for dry hands with hand cream. However, hand cream generally gives a feeling of stickiness and sliminess after application, and causes discomfort during work after application (use of a personal computer, writing with a pen, etc.).
On the other hand, there has been proposed a water-in-oil emulsion composition that eliminates stickiness by having silicone as a main component and has a refreshing feeling of use (Cited document 1). In addition, a water-in-oil emulsified composition has also been proposed that gives a refreshing sensation by releasing the water contained by the pressure and shear force during application (Cited document 2).

However, even with the above-described composition, no special examination has been made on the sticky feeling or slimy feeling in the work after application to the hand (use of a personal computer, writing with a pen, etc.), and there is a need for improvement. It was.

JP 2013-107887 A JP2013-216649A

  Therefore, it is intended to provide a water-in-oil emulsion composition that has a high refreshing feeling and moisturizing feeling and does not cause stickiness or sliminess in the work after application (use of a personal computer, writing with a pen, etc.). Objective.

  In view of such circumstances, as a result of intensive studies by the present inventors, a water-in-oil emulsified composition in which moisture contained by pressure and shearing force at the time of application is released, and the following (A) to (D) It is found that there is a high refreshing feeling and moisturizing feeling, and no sticky feeling or slimy feeling is produced in the work after application (use of a personal computer, writing work with a pen, etc.) in the hand. It came to. (A) polyether-modified cross-linked silicone, (B) polyether-modified silicone, (C) dimethicone and (D) inorganic salt.

  That is, the present invention is a water-in-oil emulsion composition in which moisture contained by the pressure and shearing force at the time of application is released, and has a high refreshing feeling and moisturizing feeling. And a water-in-oil emulsified composition that does not give a sticky feeling or a slimy feeling.

In the water-in-oil emulsion composition of the present invention, the encapsulated water is released by the pressure and shearing force at the time of application.

The emulsified composition of the present invention contains the component (A), the component (B), the component (C) and the component (D).

  The component (A) used in the present invention is preferably a (dimethicone / (PEG-10 / 15)) cross polymer.

  In the water-in-oil emulsion composition of the present invention, in addition to the component (A), a polyether-modified cross-linked silicone such as (dimethicone / bis-isobutyl PPG-20) cross-polymer is within the range not impairing the effects of the present invention. May be blended as appropriate.

As for the compounding quantity of the said (A) component used for this invention, 0.5-2.5 mass% is preferable. Furthermore, 0.75 to 2.25 mass% is preferable, and 1.25 to 1.75 mass% is particularly preferable. If it is less than 0.5% by mass, the moisturizing feeling may be inferior, and there may be a feeling of sliminess in the work after application. Moreover, the water-in-oil emulsion composition may not be adjusted. If it exceeds 2.5% by mass, the contained moisture may not be released, so that the refreshing feeling may be inferior. In addition, there may be a feeling of slimness and stickiness in the work after application to the hand.
In the present invention, “%” indicating the content of other components is “% by mass” unless otherwise specified.

  The HLB value of the component (B) used in the present invention is preferably 10.0 or less. If the HLB value exceeds 10.0, the refreshing feeling may be inferior, and a slimy feeling and sticky feeling may occur in the work after application.

  HLB is an index indicating a hydrophilic-lipophilic balance and is calculated using the “Griffin method”. The “HLB value is 10.0 or less” means a surfactant having an HLB at 25 ° C. of 10.0 or less in the meaning of the Griffin method.

  The component (B) used in the present invention is not particularly limited, but PEG-3 dimethicone, PEG-9 dimethicone, PEG-10 dimethicone, PEG-12 dimethicone, PEG / PPG-19 / 19 dimethicone, polysilicone-13, PEG / PPG-30 / 10 dimethicone, PEG / PPG-20 / 22 butyl ether dimethicone, etc. can be used.

  The blending amount of the component (B) used in the present invention is preferably 0.1 to 1.0%. Furthermore, 0.1 to 0.6% is preferable, and 0.1 to 0.3% is particularly preferable. If it is less than 0.1%, the moisturizing feeling may be inferior, and the hand may have a slimy feeling in the work after application. If it exceeds 1.0%, the contained water may not be released, and thus the refreshing feeling may be inferior. In addition, there may be a feeling of slimness and stickiness in the work after application to the hand.

The component (C) used in the present invention preferably has a kinematic viscosity of 10 to 100 mm ² / s. More preferably having from 10 to 50 mm ² / s, particularly those of 10 to 30 mm ² / s preferred. If it is less than 10 mm ² / s, the moisturizing feeling may be inferior. If it exceeds 100 mm ² / s, the refreshing feeling may be inferior, and a slimy and sticky feeling may be produced in the work after application.
In addition, although the said (C) component used for this invention is not limited, KF-96A-10CS (kinematic viscosity 10mm < ² > / s), KF-96A-30CS (kinematic viscosity 30mm) marketed from Shin-Etsu Chemical Co., Ltd. ² / s), KF-96A-50CS (kinematic viscosity 50 mm ² / s), KF-96A-100CS (kinematic viscosity 100 mm ² / s), and the like can be used.

  The kinematic viscosity is measured by an improved Ostwald viscometer according to “Quasi-drug Raw Material Standard 2006 General Test Method Viscosity Measurement Method 1”. However, the measurement temperature is 25 ° C. ± 0.1 ° C.

  The blending amount of the component (C) used in the present invention is preferably 4.0 to 14.0%. Furthermore, 6.0 to 12.0% is preferable, and 8.0 to 10.0% is particularly preferable. If it is less than 4.0%, the moisturizing feeling may be inferior, and there may be a feeling of sliminess and stickiness in the work after application. If it exceeds 14.0%, the refreshing feeling may be inferior, and there may be a feeling of slimness and stickiness in the work after application.

  The component (D) used in the present invention is not particularly limited, but chloride salts such as sodium chloride, potassium chloride, calcium chloride and magnesium chloride, sulfates such as sodium sulfate, potassium sulfate, magnesium sulfate and aluminum sulfate are used. be able to.

  In the water-in-oil emulsion composition of the present invention, inorganic salts such as carbonates, phosphates and acetates may be appropriately blended in addition to the component (D) as long as the effects of the present invention are not impaired.

  The blending amount of the component (D) used in the present invention is preferably 0.2 to 0.8%. Furthermore, 0.3 to 0.7% is preferable, and 0.4 to 0.6% is particularly preferable. If it is less than 0.2%, the refreshing feeling may be inferior. If it exceeds 0.8%, a hand may have a slimy feeling in the work after application.

  In the water-in-oil emulsion composition of the present invention, a hydrocarbon oil, an ester oil, a vegetable oil, a higher alcohol, or the like may be appropriately blended as an oil within a range that does not impair the effects of the present invention.

When the oil agent is a vegetable oil, a high moisturizing feeling is obtained, and although not particularly limited, shea fat, cocoa butter, mango seed fat and the like can be mentioned. Among them, shea fat provides a higher moisturizing feeling.

  0.001 to 1.0% is preferable and the blending amount of the vegetable oil is more preferably 0.5% or less. If it is less than 0.001%, a moisturizing feeling may not be obtained, and if it exceeds 1.0%, a hand may have a slimy or sticky feeling in the work after application.

  In the water-in-oil emulsion composition of the present invention, a cross-linked silicone such as (dimethicone / vinyl dimethicone) crosspolymer may be appropriately blended within a range not impairing the effects of the present invention.

  By using the cross-linked silicone, it is possible to reduce the feeling of slimness and stickiness in the work after application to the hand.

  The amount of the crosslinked silicone is preferably 0.025 to 0.1%, more preferably 0.05% or less. If it is less than 0.025%, there is a possibility that the effect of reducing the feeling of stickiness or stickiness in the work after application to the hand may not be obtained. There may be a sticky feeling.

  The water-in-oil emulsion composition of the present invention may be appropriately blended with raw materials usually used for other cosmetics and the like within a range not impairing the effects of the present invention. Nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, moisturizers, water-soluble polymers, antioxidants, UV absorbers, chelating agents, antiseptics, antibacterial agents , Coloring agents, fragrances, vitamins, plant extracts and the like.

  In addition, the water-in-oil emulsion composition of the present invention can be widely applied to cosmetics and quasi-drugs that have been applied to the skin, but has a high refreshing feeling and moisturizing feeling, and is applied to the hand after application. It is particularly excellent for hand care in that it does not produce a slimy or sticky feeling in the above work.

  Hereinafter, the present invention will be described in more detail with reference to examples. The present invention is not limited thereby.

  Prior to the examples, the evaluation methods employed in the examples will be described.

Moisture release 0.1 g of the water-in-oil emulsion composition shown in the Examples and Comparative Examples was placed on the back of the hand and spread with a finger to apply pressure and shearing force to confirm whether moisture was released.
<Evaluation criteria>
A: Water comes out.
X: Moisture does not come out.

Refreshing feelings The water-in-oil emulsion compositions shown in the Examples and Comparative Examples were used by 20 test subjects to evaluate whether or not they felt a refreshing feeling.
<Evaluation criteria>
A: Very good More than 15 people felt a refreshing feeling.
○: Good 10-14 people felt a refreshing feeling.
Δ: Normal 5 to 9 people felt refreshed.
X: Bad Four or less people felt a refreshing feeling.

The 20 water-in-oil emulsion compositions shown in the moisturizing feeling examples and comparative examples were used by 20 test subjects to evaluate whether or not they felt a moisturizing feeling.
<Evaluation criteria>
A: Very good More than 15 people felt a moisturizing feeling.
○: Good 10 to 14 people felt a moisturizing feeling.
(Triangle | delta): Normal 5-9 persons felt the moisturizing feeling.
X: Bad 4 or less people felt a moisturizing feeling.

The feeling of sliminess was evaluated by letting 20 subjects use the water-in-oil emulsion compositions shown in Examples and Comparative Examples, and writing with a metal ballpoint pen.
<Evaluation criteria>
A: Very good More than 15 people evaluated that they did not feel slimy.
○: Good 10 to 14 people evaluated that there was no slimy feeling.
(Triangle | delta): Normal 5-9 evaluated that there was no slimy feeling.
X: Bad 4 or less evaluated that there was no slimy feeling.

The water-in-oil emulsified compositions shown in the stickiness examples and comparative examples were used by 20 subjects, and writing was performed with a metal ballpoint pen to evaluate the presence or absence of stickiness.
<Evaluation criteria>
A: Very good More than 15 people evaluated that there was no stickiness.
○: Good 10 to 14 people evaluated that there was no stickiness.
Δ: Normal 5 to 9 people evaluated that there was no stickiness.
X: Bad 4 or less evaluated that there was no stickiness.

(Examples 1-27, Comparative Examples 1-8)
The water-in-oil emulsion compositions shown in Examples 1 to 27 and Comparative Examples 1 to 8 were prepared, and the release of moisture, refreshing feeling, moisturizing feeling, slimy feeling and sticky feeling were evaluated, and the results are shown in Tables 1-4. It was shown to.

Preparation method Phase a is mixed uniformly, and phase b is gradually added with stirring. After adding b phase, continue mixing until proper hardness. The blending amounts of the b-phase citric acid and sodium citrate are adjusted as appropriate so that the pH of the b-phase is about 5.5.

比較例１および比較例２はａ相とｂ相を混合したときに分離してしまい、油中水型乳化組成物を調製することができなかった。

Comparative Example 1 and Comparative Example 2 were separated when the a phase and the b phase were mixed, and a water-in-oil emulsion composition could not be prepared.

比較例３は保湿感およびぬめり感が劣った。比較例４はぬめり感およびべたつき感が劣った。

Comparative Example 3 was inferior in moisturizing feeling and slimy feeling. Comparative Example 4 was inferior in sliminess and stickiness.

比較例５および比較例６はさっぱり感、ぬめり感およびべたつき感が劣った。比較例７は、保湿感、ぬめり感およびべたつき感が劣った。

Comparative Example 5 and Comparative Example 6 were inferior in refreshing feeling, sliminess and stickiness. Comparative Example 7 was inferior in moisturizing feeling, sliminess and stickiness.

比較例８はさっぱり感が劣った。

In Comparative Example 8, the refreshing feeling was inferior.

  As is clear from Examples 1 to 27, the water-in-oil emulsion composition of the present invention releases the water contained by the pressure and shearing force during application, has a high refreshing feeling and moisturizing feeling, and is applied to the hand. There was no stickiness or sliminess in later work.

When a modified cross-linked silicone other than the component (A) is blended as in Comparative Example 1, it is separated and a water-in-oil emulsion composition cannot be prepared. Even when the component (A) is not blended as in Comparative Example 2, it is separated and a water-in-oil emulsion composition cannot be prepared. When the component (B) is not blended as in Comparative Example 3, the moisturizing feeling is inferior, and a slimy feeling is produced in the work after application. When the component (B) is Comparative Example 4, the hand feels slimy and sticky in the work after application. As in Comparative Example 5 and Comparative Example 6, in the case of oils other than the component (C), a refreshing feeling is inferior, and a slimy feeling and a sticky feeling are generated in the work after application. In the case where the component (C) is not blended as in Comparative Example 7, moisture is not released, the moisturizing feeling is inferior, and a slimy feeling and sticky feeling are produced in the work after application. When the component (D) is not blended as in Comparative Example 8, the refreshing feeling is inferior.

実施例２８、２９、３０に示した油中水型乳化組成物は塗布時の圧力およびせん断力により内包された水分が放出され、高いさっぱり感や保湿感があり、手に塗布後の作業におけるべたつき感やぬめり感がなかった。 (Examples 28, 29, 30)
Table 5 shows formulation examples.

The water-in-oil emulsified compositions shown in Examples 28, 29, and 30 release moisture contained by the pressure and shearing force at the time of application, and have a high refreshing feeling and moisturizing feeling. There was no stickiness or sliminess.

The present invention is a water-in-oil emulsified composition in which moisture contained by the pressure and shearing force at the time of application is released, and has a moisturizing feeling and a refreshing feeling. It is possible to provide a water-in-oil emulsified composition that does not give a sticky or slimy feeling in a writing operation with a pen.

Claims (5)

The following (A) to (D) are blended, and the blending amount of the following (C) component is 8.0 to 10.0% by mass, and the contained water is released by the pressure and shearing force at the time of application. A water-in-oil emulsion composition for hand care.
(A) (Dimethicone / (PEG-10 / 15)) Crosspolymer (B) Polyether-modified silicone (C) Selected from dimethicone (D) chloride salt or sulfate having a kinematic viscosity of 10-30 mm ² / s One or more inorganic salts The water-in-oil emulsion composition for hand care according to claim 1, wherein the blending amount of the component (A) is 0.5 to 2.5 mass%. The HLB of the said (B) component is 10.0 or less, The water-in-oil emulsion composition for hand care of any one of Claim 1 to 2. The water-in-oil emulsion composition for hand care according to any one of claims 1 to 3, wherein a blending amount of the component (B) is 0.1 to 1.0% by mass. The water-in-oil emulsion composition for hand care according to any one of claims 1 to 4 , wherein a blending amount of the component (D) is 0.2 to 0.8 mass%.